Goodwill and Intangible Assets (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended	12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill	[1]	$ 597			$ 597	$ 530	$ 525
Disposals and other, net	[2]				5	5
Goodwill Acquired and Impaired During Period					62
Impairment and closure expense	[3]				172	5	6
Goodwill [Member]
Changes in the carrying amount of goodwill [Roll Forward]
Impairment and closure expense		0	$ 5	$ 139	144
KFC Global Division [Member]
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill	[1]	235			235	233	230
Disposals and other, net	[2]				2	3
Goodwill Acquired and Impaired During Period					0
Pizza Hut Global Division [Member]
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill	[1]	202			202	199	196
Disposals and other, net	[2]				3	3
Goodwill Acquired and Impaired During Period					0
Goodwill, Impaired, Accumulated Impairment Loss		17			17
Taco Bell Global Division [Member]
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill	[1]	98			98	98	99
Disposals and other, net	[2]				0	(1)
Goodwill Acquired and Impaired During Period					0
The Habit Burger Grill Global Division
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill	[1]	62			62	0	$ 0
Disposals and other, net	[2]				0	$ 0
Goodwill Acquired and Impaired During Period					62
Goodwill, Impaired, Accumulated Impairment Loss		$ 144			$ 144

[1] Goodwill, net includes $144 million of accumulated impairment loss recorded in the year ended December 31, 2020, related to our Habit Burger Grill segment and $17 million of accumulated impairment losses for each year presented related to our Pizza Hut segment.

[2] Disposals and other, net includes the impact of foreign currency translation on existing balances and goodwill write-offs associated with refranchising.

[3] The year ended December 31, 2020, includes a charge of $144 million related to the impairment of Habit Burger Grill goodwill. The year ended December 31, 2020, also includes charges of $12 million related to the impairment of restaurant-level assets and charges of $11 million related to the write-off of software no longer being used.